idioms

  clean as a whistle (very clean, spotless) I want you to get this car as clean as a whistle. The food was good, and the kitchen was clean as a whistle.   (innocent of wrongdoing) John is as clean as a whistle and has no criminal record.       …

  whistle in the dark (pretend you are relaxed and not afraid) I whistle in the dark just to cheer myself up. Tom appears to be relaxed, but he might just be whistling in the dark.     envocabulary.com

  walk the talk (to put your words into action) We are very happy to see that you are walking the talk. Most people will talk the talk; there are a few people who actually walk the talk.   envocabulary.com

    talk the talk  informal (speak in a way that is meant to persuade or impress) Few politicians talk the talk like him. You talk the talk, but don’t walk the walk. [=You promise to do things, but you will not actually do them.]     envocabulary.com

  turn the corner (pass a difficult period and start to improve) Your brother’s surgery was successful, but he’ll turn the corner for at least 36 hours. We can turn the corner if we increase our sales volume by 15%.   envocabulary.com